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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-020
General
Each T/R translating sleeve has two deactivation points. You
install two pins at these points to deactivate the T/R for airplane
dispatch.
Each translating sleeve has two holes at the deactivation points.
Rubber plugs are usually in these holes. You remove these
plugs before you install the pins. The pins are usually in the fly
away kit.
The pins mechanically connect the translating sleeve structure
to the stable cascade support ring. This prevents the movement
of the T/R sleeve.
Be sure to follow the thrust reverser deactivation for flight
dispatch procedure found in the airplane maintenance manual
(AMM).
THRUST REVERSER - DEACTIVATION FOR FLIGHT DISPATCH - TRAINING INFORMATION POINTS
EFFECTIVITY
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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-200
THRUST REVERSER - DEACTIVATION FOR FLIGHT DISPATCH - TRAINING INFORMATION POINTS
THRUST REVERSER - DEACTIVATION FOR FLIGHT DISPATCH - TRAINING INFORMATION POINTS
EFFECTIVITY
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Page 45
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-200
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78-34-00
Page 1
D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The thrust reverser control system controls hydraulic and
electrical power to the thrust reverser for stow and deploy
operations.
THRUST REVERSER CONTROL SYSTEM - INTRODUCTION
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-000
THRUST REVERSER CONTROL SYSTEM - INTRODUCTION
THRUST REVERSER CONTROL SYSTEM - INTRODUCTION
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-000
THIS PAGE IS INTENTIONALLY LEFT BLANK
THRUST REVERSER CONTROL SYSTEM - INTRODUCTION
78-34-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The thrust reverser control system controls hydraulic power
and electrical power to deploy and stow the thrust reverser (T/
R) translating sleeves. The system uses 24/28v dc electrical
power and reverse thrust lever position for control.
You can deploy the thrust reversers when the airplane is less
than 10 feet (3 meters) from the ground. The flight control
computers (FCC) and a radio altimeter operated relay supply
airplane altitude information. An air sensing relay supplies the
air/ground logic. The fire handle must be down for the control
system to use the electrical power.
Each T/R control valve module controls hydraulic power to
deploy or stow their T/R. Each module contains the electrical
and hydraulic components necessary to control the hydraulic
flow to the T/R hydraulic actuators. There are two T/R control
valve modules on the airplane. One for each T/R.
Sync shafts on each translating sleeve make sure the sleeve’s
three actuators operate at the same speed. The actuators can
operate only if the shaft is free to turn.
A sync lock connects to the bottom hydraulic actuator on each
T/R half. The sync lock must unlock for the sync shafts to turn.
During normal T/R operation, the sync locks energize to unlock.
The sync lock is also a manual drive mechanism. You use the
sync lock to manually move the T/R translating sleeves for
maintenance operations.
The engine accessory unit (EAU) has the electrical circuits
necessary for stow operation. The EAU also uses input from
sleeve proximity sensors for auto-restow logic.
The reverser thrust levers operate switches on the autothrottle
switch packs. These switches control signals to these
components:
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